Belvedere and Schonbrunn castles are truly unique places in Vienna, Austria. Combined, these two castles draw nearly 10 million visitors a year, and it is easy to see why visitors are charmed by the beauty of these venues. Part of that beauty is the maintenance of the grounds around the castles. From seas of perennial flowers to acres of finely manicured turf, visitors can easily see how involved just maintaining the grounds can be.